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Posted: 8/18/2003 5:38:11 PM EDT
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My Bushy 14.5 1/7 upper seems to have the front sight canted a little to the right. I had to burn up alot of right clicks on my ARMS40 to get it rough zero'd at 25 yds. I don't know if it is the barrel indexing into the receiver, or the installation of the front sight tower on the barrel. Who should I send it to to get it corrected? Bushmaster? Will I have to wait 6 mo. to get it back? TIA, Cleophis |
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If you still have several clicks to go, I'd leave it alone. Best to get out onto a range and get some real shooting done and see where they land at 100 meters, then see from there. Centered isn't as important compared to what you get for results, it might be a real barn burner with great accuracy. Good shootin, Jack |
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cleophis This seams to be a re-occuring problems with Bushmaster lately, there have been several posts about this in the past, however Im not sure how far back and where to tell you to get a link. I had this happen on two of the last two rifles I purchased from them. I sent one 20" A3 upper back to them and they returned it 2 weeks later and said it was fixed, problem was, it wasnt fixed!!!, I dont think they even touched it. I had four clicks left all the way to the right before it was bottomed out with both an ARMS #38 and the Bushy carry handle had 2 clicks left. I sold the rifle. The other one is a carbine m4 type and it is exactly the same but im hanging onto it for awhile. good luck cp |
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Thanks guys. Good grief Eagle, does that mean they CAN't fix it? I would think that if it lines up with the gas port, well, you should be able to index it into the receiver or could I be in between a notch? This sucks because I have no right windage adjustment left but maybe 4 clicks like ya'll said. I'm going rant at the Bushy industry site and see what they say. tks guys, Cleophis |
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You could send it to MSTN and get the PRI flip sight with 2 allen screws installed (it's like installing the front post all over again new grooves need to be milled.) Or put a KAC low profile gasblock on it and use a KAC folding RAS mount Front sight. [b]If you use a sight like a KAC 300meter backup rear it won't bother you as much as there are no protective "wings" crowding the rear sight.[/b] Bushy makes a folding front post for $95 that is simply installed by cutting and grinding off the front post (reblue) then the new unit clamps over the barrel with set screws (they use this for sights on V-match rifles). Their are a lot of solutions on your end but none are cheap. [b]If you want it done for free send it back and demand a replacement (if this starts getting Bushmaster in the wallet they might re-calibrate machines or replace them untill it stops happening.) [/b] I had a 14.5in HBAR that I installed a PRI post on and leveled it perfectly and there was not enough gas to reliably cycle the action because of the fact that the original post was canted so I had to either use a suppressor to get it to function or enlarge the gas port. |
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The problem isn't machines, it's people. Specifically, the guys that assemble the barrel assembly to the upper receiver are allowing the barrel to turn with the barrel nut as they're applying final torque to the nut. This results in a slight misalignment of the barrel to the receiver, but since the sights are over 2" out from the bore axis, a slight misalignment means many clicks of windage. This problem is easily corrected if you have the tools to rebarrel an upper. Ideally, you put a piece of pointed-end drill rod in the channel of the carry handle that "points" the the front sight, and you make sure that everything lines up after you torque the barrel nut. You also need to ensure that the base portion of the barrel nut is lubed with the same moly lube you're using for the threads, but that the barrel-to-receiver interface is NOT lubed. If you can't, or don't want to fix the problem yourself, CALL Bushmaster, ask for Jerrod, and they'll fix it for you. -Troy |
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